1) Design Related Risks | D1) Design errors and omissions D2) Design process takes longer than anticipated D3) Stakeholders request late changes D4) Failure to carry out the works based on the contract |
2) Construction Related Risks | C1) Cave-ins or excavation collapses C2) Construction equipment failures C3) Falling of excavated material C4) Changing conditions – strata and stress field fluctuations C5) Tunnel instability – rock or earth falls and rock bursts C6) High noise levels and vibration and dust C7) Excessive seepage and ground water inflow C8) Fire or explosion problem |
3) Project Management Risks | M1) Failure to comply with contractual quality Requirements M2) contractor delays, M3) Scheduling errors M4) Project team conflicts |
4) Environmental Related Risks | En1) Environmental analysis incomplete En2) Air contamination or oxygen depletion En3) Incomplete environmental analysis |
5) Right of way Risks | R1) Improper & delay in resettlement of the land owners R2) Conflict with the land owners |
6) Organization Related Risk | O1) Inexperienced workforce and staff turnover O2) Delayed deliveries O3) Lack of protection on a construction site |
7) External Factors Risks | Ex1) New stakeholders emerge and request changes Ex2) Public objections/challenges Ex3) Laws and local standards change Ex4) Tax change Ex5) Construction cost increasing |